About Felix
Need to move faster, but your team’s already at capacity?
I help product teams and tech leaders deliver backend-heavy features, integrations, and infrastructure - fast, clean, and in 2-week fixed-scope sprints.
Whether you’re unblocking a roadmap item, integrating third-party systems, or building internal tools, I bring clarity, speed, and production-ready code.
With 9+ years of experience in Java, Spring Boot, AWS, and modern frontend frameworks (React, Next.js, Tailwind), I plug into teams quickly and deliver with minimal overhead.
- Backend systems & APIs (Spring Boot, PostgreSQL, microservices)
- Fullstack feature delivery (React, Tailwind, etc.)
- AWS infrastructure (ECS, Lambda, CDK, Terraform)
- AI integrations (LLMs, GPT APIs, RAG pipelines)
- ETL automation, dashboards, platform APIs (Salesforce, SAP, etc.)
Teams at TUI, BMW, ING, and several startups trust me to deliver - hands-on, architectural, and outcome-driven.
📍 Based in Frankfurt · Remote-friendly · English & German
English
Native or bilingual
German
Native or bilingual
Can work on-site
Frankfurt am Main (up to 15km)
Experience
- MicromerceSenior Software EngineerMay 2024 - Today (2 years and 2 months)• Developed complex customer workflows on the Micromerce platform to streamline business operations.• Co-developed a support tool using RAG and LLMs for automated responses, improving support efficiency.• Processed Salesforce data for actionable insights, set up automated dashboards for KPI tracking, and prepared C-level reports to support strategic decision-making.• Leading outsourcing initiatives and managing external development teams to ensure delivery quality, scalability, and cost-efficiency.• Coaching & mentoring of 4 junior colleagues
- Self-employedFreelance Full Stack Software EngineerDecember 2021 - October 2024 (2 years and 10 months)• Mentored a junior developer in Clean Code, architecture understanding, and TDD strategies.• Collaborated closely with business units to implement complex requirements in existing systems.• Advised on Microservices architecture, API design, and communication using SQS/SNS.• Developed automated ETL pipelines and tools for data extraction and conversion.
- ING DeutschlandApplication DeveloperFebruary 2020 - December 2021 (1 year and 10 months)Frankfurt, HE, GermanyDelivered and tested regulatory banking features in a complex Java/Spring Boot microservices landscape with a focus on quality and maintainability.• Developed Test Reporting Hub application for automated archiving of test results meeting ECB regulatory requirements.• Enhanced FitNesse Central test wiki system for efficient test case validation against applications.• Created Test Reporting Maven Plugin for seamless integration into Jenkins pipelines for automated test reporting.
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Education
- Mathematisch-technische/r Softwareentwickler, Mathematics and Computer ScienceOberstufenzentrum für Informations- und Medizintechnik Berlin2018Mathematisch-technische/r Softwareentwickler, Mathematics and Computer Science
- High School DiplomaTrumbull High School2015High School Diploma